The referee grabs Ukraine's Vyacheslav Shabranskyy to stop the fight during the second round of Shabranskyy's light heavyweight title boxing match against Russia's Sergey Kovalev, right, early Sunday, Nov. 26, 2017, in New York. Kovalev stopped Shabranskyy in the second round. (AP Photo/Frank Franklin II)

The referee grabs Ukraine's Vyacheslav Shabranskyy to stop the fight during the second round of Shabranskyy's light heavyweight title boxing match against Russia's Sergey Kovalev, right, early Sunday, Nov. 26, 2017, in New York. Kovalev stopped Shabranskyy in the second round. (AP Photo/Frank Franklin II)